You can create a timer targeting a specific pair such as BTC_ETH
The timer will ask a minimum and a maximum value.
When the lowest ask is lower than the minimum the alarm will be triggered.
When the highest bid will be higer than the maximum the alarm will be triggered.
maximum can be lower than minimum
You can work wit more than one alarm on the same window.
You can have more alarms targeting the same pair and triggering at different values.
Use Display in order to run one or more Timers.
Examples:
http://cryptosensor.overgrid.com/display.html?s=4-BTC_ETH|4-BTC_LTC
http://cryptosensor.overgrid.com/display.html?s=4-BTC_ETH|4-BTC_ETH|4-BTC_ETH